← Back to the periodic table
45
Rh
102.91
Rhodium
Transition metals · Group 9 · Period 5
Atomic properties
| Atomic number | 45 |
|---|---|
| Symbol | Rh |
| Standard atomic weight | 102.91 |
| Classification | Transition metals |
| Group | 9 |
| Period | 5 |
| Block | d-block |
| Electron configuration | [Kr] 4d8 5s1 |
| Electronegativity (Pauling) | 2.28 |
| Common oxidation states | +3 |
Physical properties
| Phase at 20 °C | Solid |
|---|---|
| Density | 12.41 g/cm³ |
| Melting point | 1964 °C |
| Boiling point | 3695 °C |
| Discovered | 1803 |
| CAS number | — |